Dimensions that may be applied to the plug weld symbol include size, depth of filling, included angle of countersink, number of welds and their spacing (pitch).

The size of a plug weld refers to its diameter in inches at the base of the weld. This dimen­sion is located to the left of the weld symbol, and is preceded by the diameter symbol 0, Figure 15.3 and Figure 15.4.

The width dimension of a slot weld is located to the left of the symbol. It represents the width of the minor axis of the slot at its base, Figure 15.5.

The sides of a plug or slot weld may be straight or tapered. When the sides of the hole are tapered, the included angle with a degree sign is applied on the same side of the symbol (above or below it, depending on location of the symbol) as shown in Figure 15.6.

The number of welds is shown in paren­thesis below an arrow side of the plug and slot weld symbols or may be specified in the tail of the welding symbol. If the included angle is also to be shown, it is placed below the angle dimension. Conversely, it is shown above the symbol when the symbol has an other side significance, Figure 15.7.

The spacing (pitch) of plug welds may also be specified. This dimension is shown to the right of the plug weld symbol, Figure 15.8.

In the case of slot welds, the spacing (pitch) dimension follows the length dimension and is preceded by a hyphen, Figure 15.9. The spacing may also be shown by means of a detail drawing.

Depth of filling is shown within the symbol for both plug and slot welds. When not shown, complete filling is required, Figure 15.10.

Note that in all cases the dimensions applied to the plug and slot weld symbol are located on the same side of the reference line as the sym­bols. A combined use of dimensions for a plug weld symbol is shown in Figure 15.11, and for a slot weld in Figure 15.12.

f 45

SIGNIFICANCE

(a) PLUG

45’

I 1

45

SIGNIFICANCE

(b) SLOT

OTHER SIDE

FIGURE 15.6(0, b) ■ Application of included angle dimension to plug and slot weld symbols.

FIGURE 15.8 ■ Pitch of plug welds.

FIGURE 15.9 ■ Length and pitch of slot welds.

DETAIL "A"

+

Л-

SYMBOL

SIGNIFICANCE

+

FIGURE 15.10 ■ Depth of filling of plug or slot welds.

t SYMBOL FOR SLOT WELD SIGNIFICANCE SYMBOL FOR PLUG WELD (a) DEPTH OF FILLING OF PLUG WELDS OR SLOT WELDS

FIGURE 15.11 ■ Combined use of dimensions for a plug weld symbol.

SYMBOL SECTION

/SEE DETAIL "A", I 5/8 |6SECTI0N A-A

DETAIL "B" SIGNIFICANCE

SYMBOL

3

f3 DEPTH 8 OF FILLING

SECTION A-A

SIGNIFICANCE

FIGURE 15.12 ■ Combined use of dimensions for a slot weld symbol.

__ _G_ . I I ^ grinc / ^ / □ / W M FIGURE 15.13 ■ Application of contour and finishing symbols.

CONTOUR AND FINISHING

a.

BROKEN LINES TO SHOW SYMBOL OUTLINE OF HOLE SECTION A-A SIGNIFICANCE

Plug and slot welds are generally finished with a flush or convex contour. When a specific contour symbol is required, the appropriate contour symbol is shown above or below the weld symbol depending on its arrow side, or other side significance, Figure 15.13. If a method of postweld finish is also to be specified, it is placed above or below the contour symbol,

Figure 15.13. In the case of a flat finish require­ment, it is so specified by a note in the tail of the welding symbol, whereas a note for a flush finish is not needed.